<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>数据统计</el-breadcrumb-item>
			<el-breadcrumb-item>数据报表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片 -->
		<el-card class="box-card">
			<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
			<div id="main" style="width: 750px;height:400px;"></div>
		</el-card>
	</div>
</template>

<script>
import echarts from 'echarts';
//深拷贝
import _ from 'lodash';

export default {
	name: 'Reports',
	data() {
		return {
			options: {
				title: {
					text: '用户来源'
				},
				tooltip: {
					trigger: 'axis',
					axisPointer: {
						type: 'cross',
						label: {
							backgroundColor: '#E9EEF3'
						}
					}
				},
				grid: {
					left: '3%',
					right: '4%',
					bottom: '3%',
					containLabel: true
				},
				xAxis: [
					{
						boundaryGap: false
					}
				],
				yAxis: [
					{
						type: 'value'
					}
				]
			}
		};
	},
	created() {},
	//此时的dom元素已经被初始化完毕
	async mounted() {
		// 基于准备好的dom，初始化echarts实例
		var myChart = echarts.init(document.getElementById('main'));

		const { data: res } = await this.$http.get('reports/type/1');
		if (res.meta.status !== 200) return this.$message.error('获取折线图失败！');

		//准备数据和配置项
		//_.merge 将深拷贝的数据进行合并
		const result = _.merge(res.data, this.options);

		// 使用刚指定的配置项和数据显示图表。
		myChart.setOption(result);
	},
	methods: {}
};
</script>

<style scoped="scoped" lang="less"></style>
